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SWM-16 Overheating

Discussion in 'DIRECTV Connected Home' started by dondude32, Jun 19, 2010.

  1. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Cooler temps are your friend (if your an electronic device). :D
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Unless it's a New England winter and you have to work outside. :eek2: :lol:
     
  3. br408408

    br408408 Legend

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    I am wondering if you could point me to some more reading on this. I build both computers and race cars and I would think all heat sinks and radiators would all be black.
     
  4. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I learned this, as you by working with race car/engines, but it was a long time ago [long before google :lol:].
    You're right about radiating heat. Black is best.

    For the SWiM-16, painting it black would maximize the radiation loss and shading it with a white shade would maximize the deduction of heat abortion from the sun.
     
  5. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Or midwest winter for the same thing....good point. ;)
     
  6. hasan

    hasan Well-Known Member

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    They are, but in direct sunlight, black gets a LOT hotter than white. VOS's solution is the correct one: shade the device and let it radiate heat (don't paint it white)
     
  7. -Draino-

    -Draino- Godfather

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    I must be missing something. I have never seen a black heat sink except when cast as part of the object.

    I have never seen a black radiator in any car, unless you are talking about the sides, and if so, there is simply not enough surface area there to make any difference in the core temp of the radiator.
     
  8. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    :lol: [damn kids]
    "Back in the day", before these were aluminum, they were copper & brass and painted black. :lol:
    I've seen black anodized aluminum heat sinks too. ;)
     
  9. -Draino-

    -Draino- Godfather

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    New Hampshire

    haha...next thing you're going try to convince me of is that at one time TV's were black & white only!!!!
     
  10. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    You just haaaad to bring that up......:lol::lol::lol:
     
  11. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    You both better NEVER get near my lawn. :lol:
     
  12. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    !rolling

    Not even after all the fertilzer I contributed? :D

    Rolling back to the topic at hand....I'm wondering out loud if there are any specs anywhere regarding "acceptable" operating temps...
     
  13. dondude32

    dondude32 Legend

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    No problems today. Blocking the sun seems to have worked. Like i said in original post swm was so hot yesterday I could only hold my hand on it for a few seconds. Today in the shade it feels warm to the touch.
     
  14. br408408

    br408408 Legend

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    I just want to find a scientific explanation as to why black conducts heat from a heatsink to the surrounding air better than white (or and any other color for that matter). I know black absorbes all light and thus get hot in the sun, but how can a color help or hinder a heatsink from conducting heat to air, other than any paint would act as some form of insulation and hinder the conduction of heat to some degree.
     
  15. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    maybe this will help: http://education.jlab.org/jsat/powerpoint/0708_conduction_convection_radiation.ppt.
     
  16. br408408

    br408408 Legend

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    Don't have powerpoint on my little netbook, but I will check it out later. Thanks, VOS

    Bill
     
  17. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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  18. hasan

    hasan Well-Known Member

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    I have an extensive inventory of high power solid state equipment here and every single piece has black heat sink fins. I've only seen silver colored ones very rarely.
     
  19. dondude32

    dondude32 Legend

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    Update for everyone, after blocking sun no more problems.Maybe i have a bad switch. But after blocking sun for last three days no more problems.
     
  20. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Well that is indeed good news.

    Perhaps the switch is OK....but all the sun added to the expected heat added up to too much high temps in total.

    Enjoy!
     

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